It is said " elle a deux soeurs".
Seven sisters are "sept soeurs" in French.
la chambre de ma soeur
'sisters forever' is 'sœurs pour toujours' in French.
"Mes deux soeurs" is how you say "my two sisters" in French.
Sister is "soeur", pronounced 'sir'.
my twin sisters is mes soeurs jumelles
Pas de soeurs
You would say "je n'ai pas de soeurs" in French to express that you do not have sisters.
"I have four sisters" is "j'ai quatre soeurs" in French.
J'ai trois soeurs.
j'ai deux sœurs
"mes sœurs sont..."